高温煅烧硫化镉光解水制氢

Photocatalytic water splitting into hydrogen over CdS heated at high temperatures

沉淀法制备的硫化镉经不同温度煅烧处理获得不同相的硫化镉光催化剂,采用X射线衍射、紫外-可见漫反射光谱表征催化剂的结构和性质.以制备的硫化镉粉体作为光催化剂,在存在空穴牺牲剂的条件下进行光解水制氢实验,研究了硫化镉晶体的相组成、牺牲剂种类和助催化剂的担载量对其光解水活性的影响.结果表明,400℃下焙烧的硫化镉具有最好的催化活性,乳酸作为牺牲剂更有利于硫化镉光解水制氢,助催化剂(铂)的担载量为0.1%时,硫化镉具有最高的光催化活性.

CdS photocatalysts with different phases are synthesized by the precipitation and calcination at various temperatures. The samples are characterized by XRD and UV-Vis diffuse reflectance spectroscopy. Photocatalytic water splitting is performed with the hole sacrificial reagent using synthesized CdS powder as catalysts. The aim of this work is to examine the influence of sacrificial reagents, cocatalyst and phase of CdS on the photocatalytic activity of water splitting into hydrogen. The research results indicate that CdS calcinated at 400 ~C shows the best catalytic activity and the CdS loaded 0.1 %Pt is advantageous for the photocatalytic water splitting into hydrogen in lactic acid solution.